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arXiv · 2104.09594

Spin-flip diffusion length in 5d transition metal elements: a first-principles benchmark

Rohit S. Nair·Ehsan Barati·Kriti Gupta·Zhe Yuan·Paul J. Kelly
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Abstract

Little is known about the spin-flip diffusion length $l_{\rm sf}$, one of the most important material parameters in the field of spintronics. We use a density-functional-theory based scattering approach to determine values of $l_{\rm sf}$ that result from electron-phonon scattering as a function of temperature for all 5d transition metal elements. $l_{\rm sf}$ does not decrease monotonically with the atomic number Z but is found to be inversely proportional to the density of states at the Fermi level. By using the same local current methodology to calculate the spin Hall angle $Θ_{\rm sH}$ that characterizes the efficiency of the spin Hall effect, we show that the products $ρ(T)l_{\rm sf}(T)$ and $Θ_{\rm sH}(T)l_{\rm sf}(T)$ are constant.

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Rohit S. Nair, Ehsan Barati, Kriti Gupta, Zhe Yuan, Paul J. Kelly. 2021-04-19. Spin-flip diffusion length in 5d transition metal elements: a first-principles benchmark. https://doi.org/10.1103/physrevlett.126.196601

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